Insulation cutting and scraping tool



July 29, 1930.

G. S. OTT

INSULATION CUTTING AND SCRAPING TOOL Filed Jan. 6, 1930 Patented July 29, 1 930 i un ran STATES INSULATION concerns an!) sonnrmola oonfl Application filed January 6, 1930. Serial No. 41%,75'74-9 This invention relates to attachments for or provision of means upon electricians pliers to enable the convenientand speedy cutting of the insulation covering of an electrical conductor and to also providemeans for scraping the wire bright for soldering or for scraping the ends of the conductor for the purpose of making an efficient electrical connection.

The object of the invention is to provide in a simple and practical form complementary or co-acting elements for the inner sides of each of the handles of a pair of pliers of the kind referred to, and which will afford the workman a ready to hand and efficient means for cuttlng lnsulation and scrapingthe wire ends for a connection.

In the drawing Figure 1 is a side elevation of a pair of electricians pliers with my attachments incorporated thereuponat the inner sides of the two handles;

. Figure 2 is an enlarged detail of the medial portion of the pliers, showing the attachments as shown in Figure 1, the said attachments being also shown upon an enlarged scale, i

Figure 3 is an enlarged detail in perspective of the elements of the invention as mount ed upon the lower handle of the pliers, as shown in Figure 1.

In combination with a pair of pliers 1, embodying the two handles 2 and 3 pivotally connected at 4, and the jaws 5, the invention comprises complementary and co-acting insulation splitting elements 6 and 7 formed integrally with or mounted upon the inner faces of the handles 2 and 3 respectively, the

insulation cutting knife 8 extended from the rear margin of the element 7, and the coacting wire scraping knives 9 and 10 upon the inner faces of the handles immediately back of the splitting elements 6 and 7. As

shown in the drawing, the elements 6 and 7 are formed integrally with the handles, while the elements 9 and 10 are shown as attachments secured in place upon the handles by set screws 11. The arrangement is thus shown for the reason that the scraping elements 9 and 10 wear out rapidly and require PAT GEORGE SHERMAN o'rr, or iananon, isconsin A frequent replacement. 1 However, 'theselele ments might also be formed cintegrallyvif preferred, or the splitting. elementsfi and "7 could be, also made asseparatei attachments and secured in and 10. a i

The insulationsplitting elements comprise the solid V-shaped knife 6 upon the handle 2, and the co-acting and: complementary grooved element 7 upon -the handle 3, these 1 elements having a V-shaped -;groove 12' into which the knife ;6 isadapted to pass as the two handles are pressed together,: as? shown in Figure 2. Itlisevidentthat by spreading the handles and insertingan insulated con ductor (not shown) within the gro'ovelQ and then pressing thehandles; together, the knife 6 will split the insulation of, the iconductor. and it is furtherevident that by then draw ing the conductor longitudinal] through the tool, the said insulation will, e "splitopen in a longitudinal direction The insulation cuttingknifeS extends from the rearmargin ofthe-elementi 7, or at the)- side ofw-the groove 12, and iswdisposed perpendicularly relative to said groove. 7 This knifei-lis sharpened at both its front and rear edges 13 and 14, while-its top is flat andaformed slightly concave as shown at 15. :lThefscrap; ing knives 9 and 10 are similar and are formed, with somewhat convexed edges 216: They are so formed and mounted upon the. inner faces of the outwardly, curving handles 2 and-3, that, when the said handles are closed together there will still remain between the rear ends of the said knives a sufficient space represented at 17, through which the said ,placeas are. the elements 9 conductor may be inserted for the purpose of scraping the wire between the knives. It

will be noted that the knife 9 is spaced away ing the pliersover the conductor, at the same time pressing the handles together, the same insulation covering is cut around circumferentlally so that it may be removed from the ice wire. The flat and concaved end 15 prevents the said element 8 from cutting into the wire itself.

Thus the elements 67 cooperate with the element 8 in providing means in the one tool, for immediately,- quickly and conveniently splitting the ins lation longitudinal-1y with the former and thenin piactically the seine operation cutting it off circumferentially with the latter. And the aforesaid elements 6 78 further coopei'zffe with the elements 9 and 10 in providingin the one tool m eans for both stripping aw'zi'j the insulation from the wire and for scraping the wire ortheends thereof for soldering or for connections. Ehe element 9 -further' cooperates with the elements G'and Sinp'rQvidirrg. a recess 18 between thetwo'in which the conductor is held wider the action" of the knife 8 r 20 While I have herein described certain specific manner and method of constructing and assembling thee'ler'rrentsof iffy invention, it is understood that I mayivary fromthe sal'n'e' in minor details, not departing from 5 the spirit of invention,- so its besfi t o censtruc't a practice-I device for the purpose intended, as defined in the ap ended claim; I cl im: In a device of the kind des'cribd, the combin'ation with a pai'IfOf pliers havin two handles pivoiaily connected setone emit of complementary elements upon the inherit-d j acnt faces of the handles for splitting longitu'dinally the insulati n of an electrical coirv 33? dnctor ol'reo'fthe saidelements" consisting of a; V-shaped knife and the other said element having a V-shaped groove for engagin the said V-shepe'd knife, :1 cutting knife extended from the latter element and disposed aper 49' dicula'rly to the said roove, the set-rile being ada ted to cut insulation cir'c'emferentizsll y, an complementary scmpin knives ripenhandles, one of the slime being" spaced from the said- V-sheped splitting knife so to vide a conductor engaging reces's edited to cooperate with the said'ciitting knife or eat tin insulation cir'cumf renfimy;

testimeny whereof Iefliimy sigh-mire.

GED'RGE' SHERMAN'OIT. 

